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11 February, 17:31

X + 7y = "70" 3x - 6y = - 33 step by step

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  1. 11 February, 17:34
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    x=7

    y=9

    Step-by-step explanation:

    x+7y=70 ... (1)

    3x-6y=-33

    divide by 3

    x-2y=-11 ... (2)

    (1) - (2) gives

    x+7y-x+2y=70+11

    9y=81

    y=9

    x-2*9=-11

    or x=-11+18=7
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